# CVE-2022-50859: linux: In the Linux kernel, the following vulnerability has been resolved:  cifs: Fix the error length of VALIDATE_NEGOTIATE...

CVE-2022-50859 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50859, released December 30, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50859
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message  Commit d5c7076b772a ("smb3: add smb3.1.1 to default dialect list") extend the dialects from 3 to 4, but forget to decrease the extended length when specific the dialect, then the message length is larger than expected.  This maybe leak some info through network because not initialize the message body.  After apply this patch, the VALIDATE_NEGOTIATE_INFO message length is reduced from 28 bytes to 26 bytes.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50859](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50859.md) | Dec 30, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50859](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50859.md) | Dec 30, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50859](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50859.md) | Dec 30, 2025 |

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